Page 253 - Parlec Catalog

Safety Warnings

Quality Specifications 251

General Safety warnings: knob, may result in injury or property damage. We at
The use of cutting tools, if proper protection is Parlec try to insure we specify the correct knob, but
observed, is generally safe. However, fragments of a due to the variety, it is the responsibility of the end
cutting tool, cutting material, or holding device may user to check that the supplied knobs are correct for
be thrown at a very high speed. These fragments the machine tool and taper type.
can cause severe bodily harm. It is of utmost It is very important not to intermix metric retention
importance that the proper precautions, including knobs with inch toolholders. The retention knob will
personal protective apparel, machine guarding, and screw in and appear to seat correctly. This is not the
other general safety practices, be taken. case, and damage may occur if used.

Parlec products are engineered with safety in mind. Be sure to fully tighten the retention knob. Failure
The materials used and the heat treat specifications to do so may result in the toolholder coming loose
meet all standards where applicable. If caution, during operation. Over tightening may result in
commonsense, and proper safety practices and swelling of the taper nose. The use of serviceable
protections are used, Parlec products perform thread lock is recommended.
without undue safety problems. However, improper
use, use of incorrect product, or applying extreme Parlec retention knobs are manufactured using
stresses to the product may result in property alloy steel. They are case hardened to insure long
damage or personal injury. service life and the core is tempered for tough shock
resistance. Material heat treat and dimensions are
Retention knob warnings: to ANSI specifications.

Machine tool manufacturers have used many various
styles and sizes of retention knobs. They often look
very similar and appear to be interchangeable. The
use of the incorrect knob, or the incorrect use of a

Additional information and material safety data sheets are available.

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